package com.leyou.page.service;

import com.leyou.page.utils.ThreadUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.io.File;
import java.io.PrintWriter;
import java.util.Map;

@Service
public class GoodsHtmlService {
    @Autowired
    private GoodsService goodsService;

    @Autowired
    private TemplateEngine templateEngine;

    private static final Logger LOGGER =
            LoggerFactory.getLogger(GoodsHtmlService.class);


    /**
     * 创建html页面
     *
     * @param spuId
     * @throws Exception
     */
    public void createHtml(Long spuId){
        PrintWriter writer = null;

        try {
            //获取页面数据
            Map<String,Object> spuMap =
                    this.goodsService.loadData(spuId);

            //创建thymeleaf上下文对象
            Context context = new Context();
            //把数据放入上下文
            context.setVariables(spuMap);

            //创建输出流
            File file = new File
                    ("E:\\nginx-1.14.0\\html\\item\\" + spuId + ".html");

            writer = new PrintWriter(file);

            //执行页面静态化方法
            templateEngine.process("item",context,writer);
        }catch (Exception e){
            LOGGER.error("页面静态化出错：{}，"+ e, spuId);
        }finally {
            if(writer != null){
                writer.close();
            }
        }
    }
    /**
     * 新建线程处理页面静态化
     * @param spuId
     */
    public void asyncExcute(Long spuId){
        ThreadUtils.execute(()->createHtml(spuId));
    }

    /**
     * 删除html页面
     * @param id
     */
    public void deleteHtml(Long id) {
        File file = new File("E:\\nginx-1.14.0\\html\\item\\", id + ".html");
        file.deleteOnExit();
    }
}
